From the list of ingredients Empire Builder is a supersoil. IMO nothing needs to be added except for some extra castings and perlite... Other than that this is a hot mix
It says no other amendments are needed but maybe that package design is just a little too pretty.
Of course, tea is ALWAYS recommended
Edit: Outdoors may need something extra if growing giant plants with a relatively small amount of this. In this case I always keep the rootmass in mind, if im growing giants plants I want giant containers/holes just meaning more soil. I would also like to stress that I have never grown outdoor lol
Edit edit: One thing I dont see in there is dolomite lime or granular lime... I see limestone, but not sure if this is just as quick and effective as your usual dol lime... But also keep in mind I dont sell soil for a living... That would be cool
Bring a new meaning to "hitting pay dirt"
INGREDIENTS
Empire Builder Producers Blend contains generous amounts of perfectly mineral balanced and microbe enhanced ingredients:
GUARANTEED ANALYSIS:
Available Phosphate (P2O5): 0.07%
Soluble Potash (K2O): 0.52%
Derived from rock phosphate, potassium sulfate.
ALSO CONTAINS NONPLANT FOOD INGREDIENT:
0.6% Humic acid from lignite.
SOIL AMENDING INGREDIENTS: Coco Coir, Sphagnum Peat Moss, Composted Forest Humus, Worm Castings, Coco Chips, Lava Rock, Pumice, Perlite, Gypsum, langbeinite, sea bird and bat guano, fish bonemeal, feather meal, bonemeal, limestone, greensand, alfalfa meal, kelp meal, glacial rock dust, azomite, soybean meal, and rice bran,
union protesters, union organizers, government whistle blowers, congressional interns, dead hookers & mistresses of senators who couldn't keep their pieholes shut even after being paid off handsomely for their silence, and other natural ingredients.